Gosh poor Jasper. Have you contacted the breeder? Do they have any clues? Or has anything like this happened to any of the other pups from her/his dogs?

Unfortunatly boxers are prone to tumors & your vet is right, most are cancerous, but even so, he is awful young for that, isn't he just about a year old? I would contact Jaspers breeder asap & let her know all that is going on w/ him.

I have been trying to keep UTD on Jasper but it is a little hard to do, so forgive me if this has been mentioned before but has he been tested for allergies?

Good luck! You & jasper deserve it!